Kelly ReillyJackie Ellis
Rafe SpallEric Bull
Naomi YangJess Deng
Harry LawteyDylan Rees
Dino FetscherGareth Morgan
Dinita GohilNisha Jones
Series2026
Under Salt Marsh
Morfa Halen is a tight-knit Welsh town precariously nestled between towering mountains and a fast-encroaching sea that threatens its very existence. As a once-in-a-generation storm begins to gather far out at sea, former detective turned teacher Jackie Ellis discovers the body of her 8-year-old pupil, Cefin, seemingly drowned. The discovery sends shockwaves through the community, reviving the ghost of an unsolved cold case that rocked the town three years prior - the disappearance of Jackie’s niece, Nessa, which cost her career.
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S1 · 6.2
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Episode 1
When ex-detective-turned-teacher Jackie Ellis discovers one of her pupils dead, her estranged partner DS Bull returns to investigate.
Episode 2
Old accusations resurface as Jackie and Bull must put aside years of mistrust before the town's tensions ignite into violence
Episode 3
With the town turning on itself as long-buried secrets emerge, Jackie and Bull's fragile partnership is tested by a new discovery.
Episode 4
DNA evidence exposes a devastating truth, forcing Jackie and Bull to choose between protecting themselves or those they love.
Episode 5
Rising floodwater cuts Morfa Halen off from the world as another body is discovered, with Bull closing in on the truth behind an illegal operation at the heart of all three cases.
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